gardiner



UNITED STATES PATENTA OFFICE.

.1?. G. GARDINER, OF NEY YORK, N. Y.

IIVIPROVEMENT'IN COTTON AND OTHER PRESSES.

Speciicaiion forming part of Letters Patent No. 3.930, dated February2S, 1845..

.T0 all whom t may concern.-

Be it known that I, P. G. GARDINER, of the city, county, and State ofNew York, have invented a new and useful Improvement in Presses forCotton, Ste.; and I do hereby declare that the following is a full,clear, and

exact description thereof, reference being had to the accompanyingdrawings, in which- Figure lis a front elevation of the press. Fig. 2 isan end elevation.'v Figs. 3 and 4 represent a modified construction.

. The nature of my invention consists of the combination of an indicatoror guide connected with the combined screw and toggle-joint, ashereinafter described.

The construction of the `frame-work a a of my press may be similar tothose now in common use, care being taken to make them strong enough tosustain-the strain brought upon them. Two toggle-joint levers, b b b b,are connected with the head of the press, toward each end thereof, attheir upper ends, and by their lower ones to a follower or platen, c. Atthe center joints, d, where the upper and lower arms, b, of thetOggle-joints connect, are nuts or blocks of metal having a female screw throughtheir centers, and alsoforming a part of the connection between theupper and lower arms, b, above named. There may may be a solid block, asrepresented in Figs. 1 and 2, having two nicks or knuckles cut out of itabove and below, between which to receive the knuckles on the arnis'b;or the nut may be made cylindrical and small, as shown in Fig. 3, havingtwo trunnions, e, projecting from it, which serve as the joint-pin.

The nuts above described are pnt onto a screw, f, that extendshorizontally across the press, from one to the other side thereof. Thisscrew is cnt right and left from the center, so that when it is turnedone way it straightens thelevers b b and forces the platen down, andwhen the motion of the screw is reversed it elevates the platen. This isan old device, but it has heretofore been found impossible to make anypractical use of it, for if the platen moved faster at one end than theotherit would break all the machinery. My improvement to obviate thisdifficulty is as follows: On each side of the pulley g, situated inthemiddle of the screw, and by which it is driven, are two guides, h, thatI denominate carriages or indicators. These are oblong blocks, havingholes through them big enough to pass the screw through. They bearagainst the hub of the pulley above named. These carriages have fourwheels, i, to them, two only of each being shown in Fig. l, which wheelstraverse up and down with the carriage as the screw rises and falls, runring on ways 7c, that are attached to the beams of the press. These ways7c are made ofiron, cast with a slot in them (shown in part in Fig. 2)forthe screw to traverse in, and are firmly bolted in a verticalposition to the braces of the press. As a modification of thisarrangement the ways can be placed near the ends of the screws and thecarriages attached to the ends of the screws, as shown in Fig. 4.

Having thus fully described my 'improve ment, what I claim therein as'new, and desire to secure by Letters Patent, is*- The combination of theguide carriages or indicators on each side ofthe pulley with the screwand lever power-press, to prevent the lateral motion, while it allows aii'ree vertical action, all as above described.

P. G. GARDINER.

'Vitnesses:

J. J. GREENOUGH, LAFAYETTE CALDWELL.

